Your Age on Other Planets
A year is one trip around the Sun — and every planet takes a different amount of time. On Mercury you're much older. On Neptune you haven't had a birthday yet.
Calculating…
How it works
Days you've been alive ÷ the number of Earth days each planet takes to orbit the Sun (Mercury about 88, Mars about 687, Neptune about 60,182).
Tips
- Your age on Mercury goes up about four times faster than on Earth.
- Jupiter takes almost 12 Earth years to orbit the Sun once.
Frequently asked questions
Why am I older on Mercury?
Mercury circles the Sun in about 88 Earth days, so it racks up 'years' about four times faster than Earth.